00:21 duration 21 seconds
CHILD 210 Unit 02 Clip 3
Unit 02 > Unit 02: Activities > U02 Observations in Development - Instructions > Clip 3 123321_03D1C6_Clip3(55)
00:20 duration 20 seconds
CHILD 210 Sitting
Unit 02 > Unit 02: Activities > U02 Observations in Development - Instructions > Clip 3